PURPOSE Preclinical studies suggested that green tea or green tea catechins can modulate the activities of drug-metabolizing enzymes. We conducted this clinical study to determine the effect of repeated green tea catechin administration on human cytochrome P450 (CYP) enzyme activities. METHODS Forty-two healthy volunteers underwent a 4-week washout period by refraining from tea or tea-related...

Tea and its constituents have demonstrated anticarcinogenic activity in both in vitro and in vivo animal studies. Results from epidemiologic studies, however, have been inconsistent. Some factors that coexist with tea consumption, such as cigarette smoking, may confound or modify the association between tea consumption and cancer risk. The objective of this study was to comprehensively evaluate...

Corresponding Author Email: [email protected] Tel.: +918899746798 Green tea is a leading beverage in the Far East for thousands of years; it is regarded for a long time as a health product. Green tea has been consumed mainly in India, China, Japan, and Thailand. Studies are now suggesting that green tea (Camellia sinensis) in particular has many health benefits. Many biological effects of gree...

background: the current study tried to investigate the antioxidant and anti-bacterial effects of green tea and grape seed extract (with a volume of 2%) on durability of tilapia packed in polyethylene bags, which were kept in cool temperature of 4±1 °c. methods: prepared fish were divided into 3 batches: 2 batches were treated by dipping for 30 min in ethanolic of green tea extract (2% v/v) and ...

BACKGROUND Green tea is a very popular beverage, and in vitro studies have shown that green tea polyphenols inhibit the growth and cellular adherence of periodontal pathogens and their production of virulence factors. We investigated the epidemiologic relationship between the intake of green tea and periodontal disease. METHODS We analyzed 940 Japanese men aged 49 to 59 years as part of a com...

Green tea and its components possess antioxidative effects in vivo and in vitro. In this study, suppressive effects of green tea extracts on oxidative stress induced by dietary lipid peroxidation products were investigated in the rat liver in vivo. Green tea extracts (10 mg/rat/day for 3 days) were orally administered to male Wistar rats (five-week-old) 10 minutes prior to the post-oral adminis...

BACKGROUND Treatment of ischemic hypertensive patients with hydrochlorothiazide can precipitate cardiac arrhythmias. Green tea, by virtue of its antioxidant potential, is responsible for cardio-protective activity. OBJECTIVE The present study was under taken to evaluate the pharmacodynamic interaction of green tea extract with hydrochlorothiazide (HCTZ) against doxorubicin (DOX)-induced myoca...

BACKGROUND The intake of some benzoic acid-containing foods or drinks such as green tea and coffee is known to increase urinary hippuric acid (HA) concentrations, and, unless this can be accounted for, may result in false-positive findings during the biological monitoring of toluene exposure. AIMS To investigate the influence of green tea and coffee ingestion on urinary HA concentrations. M...

Green tea, green tea polyphenols and epigallocatechin gallate (EGCG) are confirmed to have beneficial effects in the treatment of diabetes mellitus, and a possible mechanism can be ascribed to their inhibitory effect against α-amylase and α-glucosidase in the digestive tract. In this paper, we first investigated the combined inhibitory effect of green tea extracts, green tea polyphenols or EGCG...

green tea extract has plenty of antioxidant. due to the toxicity of synthetic antioxidants, it is necessary that these antioxidants in products such as donuts be replaced with natural antioxidants. the purpose of this research is to reduce the usage of synthetic antioxidants as it is possible. so the extract was extracted and it was used as a natural antioxidant in the dough of donuts. due to t...